Fc-0 Features; Fc-0 And Initialization; Device States (Fc-0, Fc-1, Fc-2); Power Up - Sun Microsystems storagetek sl500 Reference Manual

FC-0 Features

FC-0 Features
The FC-0 level defines the physical level of the Fibre Channel protocol. This
includes media types, connectors, and the optical characteristics that are necessary
for connecting ports.

FC-0 and Initialization

A minimum level of initialization occurs at the FC-0 level.
When the library is powered on, this level assures that the links are active and
initializes any shortwave laser transmitters. Longwave laser transmitters and all
receivers are ready immediately. The level conveys any loss of signal state to the
FC-1 level, which reports it to the FC-2 level.

Device States (FC-0, FC-1, FC-2)

The following sections describe the relationships between library states and port
states and between library states and incoming commands. Communication about
device states involves the FC-0, FC-1 and FC-2 levels.

Power Up

When the library completes the power-on process, both of the Fibre Channel ports
are enabled and attempt to initialize on the attached Fibre Channel topology.
When the library completes the power-on initialization process, the library (LUN=
0) transitions from offline to online and is capable of media changer operations.

Not Ready

Commands like Inquiry that do not require the library to be online will still execute
normally.
All other commands that require the library to be online will get a Check Condition
status.

Ready

All available commands may now be executed with the library.

Power Down

In the process of powering down the library, the Fibre Channel Protocol chips will
lose power. If the library is connected to a hub or switch, the hub/switch bypass
will be activated. The library has no port bypass capability.
44 SL500: Interface Reference Manual • July 2008 Revision: F • 96122